Military RFID Sensors Hidden Inside Fake Rocks?

Military RFID Sensors Hidden Inside Fake Rocks?: «Scientists and the military often share a common quality: imagination. For example, in ‘US military ‘rocks’ spy world,’ the Financial Times reports that the U.S. military is developing RFID sensors that will be installed in fake little rocks. These ‘rocks’ which will be the size of golf balls, will be sent from an aircraft and will detect enemies by ‘listening’ to them from 20 to 30 meters. These sensors should be operational within 18 months and they should be cheap enough to leave them on the battlefield after they completed their tasks.»